waite



Patented September 20, 1904.

PATENT QEEICE.

GUY B. VVAITE, OF NEW YORK, N. Y.

lEXTENSIBLE CENTERlNG-SUPPORT.

SPECIFICATION forming part of Letters Patent No. 770,617, dated September 20, 1904;.

Application led July 5, 1904. Serial No. 215,328. (No model.)

To a/ZZ whom t muy concern.'

Be it known that I, GUY B. WAITE, a citizen of the United States, residing in the city, county, and State of' New York, have invented certain new and useful Improvements in EX- tens'ible Centering-Supports Employed in the Construction of Arches, of' which the follow- :ing is a specification.

My invention relates to an improved form and construction of temporary centering-su pports used in the construction of arches of' concrete, masonry, and the like.

In the class of' devices t0 which my present invention relates the concrete is filled in upon atemporary wooden form or support, consisting of lagging-strips transversely overlying a series of' ribs disposed across the space between two adjacent permanent I-beam supports of the permanent arch, such as the floorbeams of a fireproof' building, and these ribs are arranged in pairs, each having a suspension hook or hanger secured to one end, by which it is hung from the lower flange ofthe I-beam, its opposite end resting slidably upon a laterally-extended support on the companion rib. Such a construction is illustrated in Letters Patent No. 655,426, granted to me August 7, 1900.

' The object of' my present invention is to simplify and cheapen the above-described construction, and this l accomplish by a construction in which the hanger and the lateral support for the other rib are combined in a single integral member by varying the form of the hanger hitherto used and giving it an inwardly-extending base adapted to be secured to the lower edge of the end portion of the rib and making saidbase long and wide enough to constitute a rest on which the adjacent end of the companion rib may be slidably supported.

My invention is illustrated in the accompalnying drawings, in whicha top view of that portion of Fig. 1 lying below the line 2 2 of the latter figure.

Fig. 3

is a perspective view of one end of the companion ribs, showing the hanger attached thereto. Fig. 4 is a perspective View of the hanger detached. Fig. 5 is aperspective view of a slightly-modified form of hanger; and Fig. 6 is a View generally similar to Fig. 1, illustrating in broken elevation a centering'- support adapted for the formation of a low or flat arch.

Referring to the drawings, 10 designates the usual floor-girders in the form of' I-beams, constituting the permanent supports for the arch.

11 designates an arched filling of concrete, cement, or other fireproof material. To support this material as it is laid in place, I employ a series of' transverse ribs disposed side by side in pairs, said ribs being designated by 12 and themselves directly supporting the lagging-strips' 13, laid transversely thereof'.

Coming now to that feature in which my invention chiefly resides, 14 designates the vertical portion or stem, 14a the outwardlyprojecting lip, and 14b the rearwardly-extending base of' an integral iron hanger, through the agency of a pair of'which the ribs are suspended from the I-beams. This hanger is made from a strip of flat iron bent transversely at two places into the form shown and of` a width equal substantially to the 4combined width of the two ribs, as shown in Fig. 2. The base 14bis of' considerable length, and, as shown in Fig. 4, has a series of holes 15 formed therethrough along one edge, whereby it may be secured by screws or nails 16 to the lower edge of the rib. When so secured, the base 14b affords a laterallyprojecting rest or support for the adjacent end ot' the companion rib, which latter has secured to its other end a similar hanger constituting a support for the adjacent end of said first-named rib, the two ribs being thus capable of suiiicient contraction and eXpansion longitudinally to afford a fit between the I-beams. The stem 14 of the hanger rises opposite the end face of the rib, to which it is secured, and the lip 14 takes over the lower flange of the I-beam, strongly suspending the entire structure from the latter in the manner plainly shown in Fig. 1. The hangers IOO may be made in varying heights or lengths to suit varying heights of arches, as illustrated in Fig. 6, wherein along' hanger 14 supports the ribs for a low or lat arch. In order to reduce the size of the hole left in the con crete by the removal of the hanger after' the concrete has set, the lip may be tapered toward its point, as shown at 14 in Fig. 5, or otherwise reduced in size.

While I have shown and described thc upper ends of the hangers as adapted to take over and rest upon the iianges of the permanent lI-beam supports and contemplate such as their principal mode of use, yet such a manner of suspending' the hangers is not o'f the essence of the invention. In some cases side boards running parallel with the I-beams on,

either side of and suspended from the latter are employed, and in such cases the upper ends of the hangers would hook over the upper edges of such side boards. My invention also is not concerned with any particular form or contour of centering-ribs. For convenience and brevity of illustration I have shown only plain rectangular ribs; but it is obvious that the herein-described rib supporting and suspending hanger is applicable to other forms of ribs, such as curved ribs or ribs having straightintermediate portions and rounded or cut-down ends.

From the foregoing itwill be seen that my invention provides a very simple, light, in-

expensive, and easily constructed and manipulated centering-support possessing a ininmum of parts and capable of being advantageously employed in connection with all kinds of arched or flat iioor-tillings for fire- Aprooil buildings and other structures.

I claiml. In a,centeringsupport for arches, the

by side and longitudinally adjustable rela- 'l tively to each other, of flat bent iron hangers secured to opposite ends of said ribs, respectively, the inner ends or bases of said hangers extending inwardly of and against the lower edges of said ribs for some distance and being eachof a width substantially equal to the combined width of the ribs to thereby form a rest for the adjacent end of the companion rib, substantially as described.

3. In a centering-support for arches, the combination with a pair of ribs disposed side by side and longitudinally adjustable relatively to each other, of hangers by which said ribs may be suspended from and between the permanent arch-supports,each of said hangers being formed of a fiat iron strip bent transversely at two places to form an inwardly-extending base, a vertical stem or shank, and an voutwardly-projecting tongue, said base being secured to the lower edge of one rib and being of sufcient length and width to form a rest for the adjacent end of the companion rib, substantially as described.

GUY B. WAITE. Witnesses:

JESSE GRANT ROE, LEONARD I. ROE. 

